Condenser



Sept. 3, 1929.

CONDENSER Filed Nov. 17. '1926 R. H.sULL|vAN l v 1,726,774

Patented Sept. 3, `1929.

UNlTED STATES y 1,726,774 PATENT OFFICE.

RAYMOND H. SULLIVAN, F ROCHESTER,

NEW YORK, ASSIGNOR TO NORTH EA'ST ELEC- TBIC COIIEANY, OF ROCHESTER, NEW YORK, ,A CORPORATION 0F NEW YORK.

CONDENSER.

Application led November 17, 1928. Serial No. 148,920.

This invention relates particularly to condensers such as are used in electric'ignition apparatus, or wherever it is necessary that the condenser form a compact, water-proof and readily interchangeable unit.

The object of the invention is to produce a condenser of simple and inexpensive form, and particularly to provide improved means for grounding one element of the condenser upon the metal case in which it is enclosed.

To the foregoing ends, the invention consists in the condenser hereinafter described, as it is deiined in the annexed claim.

In the accompanying drawings, Fig. 1 is a longitudinal section of a condenser embodying the present invention. Fig. 2 is a transverse section of the condenser. Fig. 3 is a perspective view of nal. Fig. 4 is a perspective view ofthe insulated terminal, and Fig. 5 is a view showing the several elements of the condenserproper in the relative positions occupied by them prioigto being wound.

The invention is illustrated as embodied in a condenser having a bodyor condenserproper 10, made up of elongated strips of conductive material 11 and 12, such as tinfoil, with interposed strips 13 of dielectric material such as waxed paper. The strips are wound about a suitable mandrel, in the usual manner, so as to form a compact roll or body, and it is usual to impregnate this roll with insulating wax and compress it into compact and regular form.

The body of the condenser is inclosed within a sheet-metal case comprising 'an elongated box-like body 14, and a ilanged cover 15. These parts may be soldered together in the usual manner. It is necessary to connect one of the tinfol strips with an external conductor or lead 16, which passes through a metal eyelet 18 mounted in, but insulated from, one end of the case, as shown in Fig. 1. For the purpose of making such connection in a simple and inexpensive manner, a connector or terminal 17 is soldered to the inner end of the lead 16. This terminal has the form of a shallow metal cup, with a flange which is made sufficiently thin and sharp so that it may be embedded easily in the material of the condenser. shown particularly in Fig. 5, the conductive elements of the condenser are made to prothe ground termlject, the one at one end of the roll and the other at the other end. Accordingly, when the terminal 17 is pressed against one end of the roll, its flange is embedded in the mass and makes an intimate contact with the element which projects at that end, while 1t does not engage the other element, since the latter is displaced in the opposite direction. A cap 19, of insulating material, incloses the terminal 17 and the adjacent end of the condenser, thus preventing the possibility of the terminal being grounded against the case.

The other element of the condenser is grounded uponthe case, by means of a second terminal 20 of the novel form shown particularly in Fig. 3. This terminal may be formed of sheet metal, and it has two lateral flanges 21, and a hook-like lug 22 formed by bending over the upper margin of the material. This terminal is hooked over the sheet metal at the end of the case,

prior to the assembling of the other parts. The terminal 17 is applied tothe condenser body before the body is introduced into the casing. and the lead through the eyelet 18. The condenser body is'then pressed down into the casing, and as this is done the ilanges 21 of the terminal 20 cut into the projecting edges of the tinfoil element which is exposed at that end, thus making an intimate contact by which that element is electrically connected with the case. The cover is then put in place and soldered, and in this operation the connector is also soldered to the case, thus making a permanent electrical and mechanical connection.

The invention claimed is:

In a condenser, the combination, with a metal case provided with a cover, and with a roll of conductive elements and insulating material, in which the edges of the respective elements project at opposite ends of the roll, of a connector formed of sheet metal and comprising a flat body, lateral flanges adapted to cut into the element projecting at one end of the condenser asthe roll is introduced laterally into the case, and an upper extremity formed to hook' over the upper edge of the case, so as tobc interposed between such edge and the cover.

RAYMOND H. SULLIVAN.

16 is then drawn- 

